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Indebtedness (Other Long-Term Debt Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2012	Mar. 31, 2012
Debt Instrument [Line Items]
Long-term Debt	$ 2,012,268	$ 1,772,287
Other long-term debt [Member]
Debt Instrument [Line Items]
Long-term Debt	$ 2,888	$ 6,150
Other long-term debt, average interest rate	6.00%
Average Maturity Period	1 year

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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